Borne



No Drawing.

UNITED :srATEs PATENT OFFICE.

ROBERT G. MEWBORNE HENRY K. MGCONNELL, OF LOUISVILLE, KENTUCKY, ASSIGNORS TO THE KENTUCKY TOBACCO PRODUCT COMPANY, OF LOUISVILLE, KENTU A CORPORATION OF NEW JERSEY.

OF PURIFYING NICOTIN FIELD-BATES.

To all whom it may concern:

Be it known that we, ROBERT Gr. MEW- BORNE and HENRY K. MOCONNELL, citizens of the United States, residing at Louisville, county of J efi'erson, State of Kentucky, have invented certain new and useful Improvements in Methods of Purifying Nicotin F ield-Baths, fully described in-the following specification.

This invention relates to certain improvements in a method for purifying nicotin dipping baths.

Nicotin is now widely used as a cleansing agent in large baths in which cattle, sheep and other animals-are dipped to free them from ticks, lice and other vermin. It is necessary, in order that these baths be efficient for the purpose intended, that they be maintained at a certain standard nicotin strength.

After these baths have been used a certain time they become very foul and dirty, owing to the presence therein ofexcrement, dirt, and certain substances which go into solution, and a new bath has to be prepared, although the nicotin content is unimpaired. The nicotin required for these baths is, however, expensive, and frequent renewals of such baths puts a considerable expense on the users.

It is the object of our invention to pro- 4 vide a method of-purifying these baths and removing therefrom the extraneous foul matter, so that after the bath becomes unfit for use it can be purified so as to be capable of further use without the addition of fresh nicotin.

We have discovered that by the addition to a foul bath'of certain reagents, the substances in solution will be precipitated, and in so doingvthe suspended matters will be carried down along with the precipitate. This precipitate, with the entangled suspended matter, may be separated from the cleansed liquid in any convenient manner,

Specification of Letters Patent.

such as filtration. The reagents which we have found in actual practice best to effect this result, are the basic acetates of lead, but other suitable clarifying agents acting to precipitate, combine with or coagulate the substances to be removed may be used Within the invention broadly consldered.

In carrying out our process with a basic acetate of lead, We clarify the bath by the addition thereto of a sufficient quantity of the basic acetate of lead, the amount of which may be determined according to the particular character of the bath to be treated. The addition of this clarifying agent precipitates therefrom the substances which render the bath foul. By filtering the bath after the addition of the acetate, these precipitated substances are removed with the solid foul matter, and the bath is again put in condition for use without the addition of further nicotin, the addition of the basic acetate of lead having-no efiect on the nicotin content of the bath.

What we claim is:

1. The method of purifying foul dipping baths containing nicotin, which consists in adding to the bath a basic acetate of lead to precipitate the substances other than nicotin held in solution in the bath, and removing the precipitate.

2. The method of purifying foul dipping baths containing nicotin, which consists in adding to the bath a suitable clarlfy ng agent which will not precipitate or combine with the nicotin and removing the solld material from the bath.

In testimony whereof, we have hereunto set our hands in the presence of "two subscribing witnesses.

ROBERT G. MEWBORNE. HENRY K. MGCONN ELL.

Witnesses:

ORMsBY DE B. GRAY, J r., WILLIAM M. BERKELEY.

Patented Sept. 30, 1919.

Application filed May 18, 1915. Serial No. 28,845. 

